Manufacture of gasolene.



W. M. BURTON. MANUFACTURE OF GASOLENE. APFLIOA'I'ION FILED AUG. 25. 1913. RENEWED MAY 85. 1914. 1. 1 5 961 Patented Aug. 4, 1914.

2 SHEETS-SHEET 1.

W. M. BURTUN.

MANUFACTURE OF GASOLENE.

nrmummn mum um. 25, 1913. nnnnwsn MAY 25,1014.

1,105,96 1L Patented Aug. 4, 191:1

Z SKEBTS-EHEPT Z.

. w I I I WILLIAM m. BURTON, or CHICAGO, ILLINOI S, ASSIGNOB TO STANDARD OIL COMPANY,

OF WHITING, INDIANA, A CORPORATION OF INDIANA.

MANUFACTURE OF GASOLENE.

Application filed August 25, 1913, Serial No. 786,456. Renewed May 25,

To all whom it may concern:

Be it known that I, WILLIAM M. BURTON, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in the Manufacture of Gasolene, of which the following is a specification.

The present invention relates to an improvement upon the method of manufacturing low boiling point products of petroleumdistillation set forth in United States Let ters Patent No. 1,049,667, granted to me J anuary -7, 1913; and it is in the nature of an extension of that method, to the end of greatly increasing by the practice thereof, the production of these products from a given quantity of fuel-oil or other high-boiling-point product of petroleum distillation.

Apparatus suitable for the practice of my improved method is illustrated in the accompanying drawings, in which- Figure 1 is a broken iew in vertical longitudinal section, diagrammatic in character, showing the parts in elevation of the first still and its accessories, and Fig. 2 is a similar view of the second still.

The apparatus illustrated in Fig. 1 is that shown in the aforesaid patent, according to the method of which a supply is introduced into the still 3 of the residualliquidortionv of the paraffineries of petroleumistillation-say, the distillate known as fuel-oilhaving a boilin point upward of 500 F., and is subjecte to a temperature from-the furnace 1, of about 650 F. to about 850 F. to distil its volatile constituents, which are conducted 01f by a pipe 5 through a condenser 6, the coil of which discharges through a pipe-extension 7 into a receiver 8 for the products of condensation. In this pipe-extension, and thus beyond the discharge-end of the coil is contained a normally-closed shut-ofl valve 9 for maintaining a pressure of from about 4 to 5 atmospheres on the liquid in the still of the vapors throughout their course to and through the condenser; and this pressure of the vapors combined with their contained heat converts thehi'gh boiling point members of the paraffin series into low boiling point members of the same series. This method of distillation is continued until the residue in the still is reduced to a thin syruplike consistency, and the original charge has been Specification of Letters Patent.

the paraflin series,

Patented Aug. 4, 1914.

1914. Serial No. 840,959.

reduced to from 30 to 40 per cent. of its bulk. In the meantime, it is desirable to open, from time to time, a relief-valve 10 in the upper end of a pipe 11 rising from near the lower end of the condenser-coil, for relieving the gas-pressure, which is liable to accumulate in the coil and obstruct the action of the apparatus.

It is at this point that my present improvement begins: The residue is withdrawn from the still 3 and is introduced into a second still 12, heated by a furnace 13 and provided with a vapor-dome 14 equipped with a pressure safety-valve 15: and a vacuum safety-valve 16, both of which are of wellknown construction and manner of operation, and need not, therefore, be shown nor described in detail. A pipe 17 connects the vapor-dome with a condenser-coil 18, discharging from its lower end through an extension 19 into a receiver 20.

The contents of the still are maintained under atmospheric or approximately atmospheric pressure thereon while under subjection to heat from the furnace 13, to distil the volatile constituents of said contents, which are conducted oil? through the pi e 17 and condensed in the condenser; an the products of condensation accumulate as a yellowish liquid in the receiver 20. This procedure is carried on until the original contents of the still 12 have been reduced to a condition of dryness, the distillate accumulated in the receiver 20 amounting to about 95 per cent. of the charge in the still 12. The liquid of condensation in the receiver 20 is withdrawn therefrom and introduced into the still 3, or into another like it for separate treatment, and is there subjected to the original process described as bein practised therein; and the resultant disti. late is a low boiling point product, belonging to the same as the second petroleum residue from which it was distilled. It is my practice, and the preferable one, instead of treating thecontents of the receiver 20 separately in a still 3, as suggested to mix them with original residue treated therein; same in either case. By following the lastnamed ractice, about 6311; per cent. of the original charge in still 3 is converted into asolene, off in the orm of though the result is the for heating that still. This leaves somewhat less than 35 per cent. of the original charge as residue to be treated in still 12, from which about 95 per cent. is distilled, leaving about 5 per cent. as dry residue or coke; and this distillate being turned back into still 3 for treatment with the charge introduced therein for the original treatment again roduces in the first still the same yields of a out 63% per cent. of gasolene and about 35 per cent. of residue. In this way the practice may be carried on endlessly, by the addition of fresh charges into the high-pressure still 3..

I thus succeed in converting practically all (not considering the incidental losses) of the original high boiling point product first treated by the rooess practised in still 3 wvith its describe accessories, into a superior article of gasolene of the same'parafifin series or group as that of the aforesaid original residue.

It will, of course, be understood by those skilled in the art, that the low boiling point product herein referred to as gasolene, is crude gasolene, which has to be prepared for the market by first treating it with strong sulfuric acid and then re-distilled to produce the finished deodorized gasolene, and

that the sulfuric-acid treatment entails a.

tillation having a. boiling point of upward of 500 F. to obtain therefrom low-boilingpointproducts of the same series, which con due of said first distillation and conducting off and condensing saidlasbnamed constitu ents, and finally subjecting the last product of condensation to the, first named treat ment.

2. The method of treating the liquid-portions of'the paraffin-series of petroleum-dis.

tillation having a boiling point of upward of 500 F. to obtain thercirom low-boilingpoint products of the same serles, wh ch con- 'sists in distilling at a temperature of from about 650 F. to about 850 l. the volatile constituents of. said liquid, conducting oil and condensing said constituents, and maintaining a pressure of from about 4 to about 5 atmospheres on said liquid of said vapors throughout their course to and while undergoing condensation, distilling under approxlmately atmospheric temperature I the volatile constituents of the residue of said first distillationand conducting off and condensing said last-named constituents, mix ing this distillate with more of said liquid and subjecting it therewith to said firstnamed treatment.-

WILLIAM M. BURTON. In presence of L. HOLZHALB, O. C. AvIsUs. 

